Intall qemu and setup buildx for multiplatform builds

Author: webhdx

.github/workflows/20-devcontainer.yml

@@ -8,14 +8,19 @@ on:
 
 jobs:
   build-and-push:
-    strategy:
-      matrix:
-        os: [ubuntu-24.04, ubuntu-24.04-arm]
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     steps:
     - name: Checkout
       uses: actions/checkout@v4
 
+    - name: Set up QEMU for multi-architecture builds
+      uses: docker/setup-qemu-action@v3
+
+    - name: Setup Docker buildx for multi-architecture builds
+      uses: docker/setup-buildx-action@v3
+      with:
+          use: true
+
     - name: Login to GitHub Container Registry
       uses: docker/login-action@v3
       with: